Circuit Automatically Reconnected Only After The Fault Is Cleared Patents (Class 361/59)
  • Patent number: 10778320
    Abstract: A method and relay for communicating a value of a parameter of a source to be monitored. The relay comprises an input sampling module for coupling to the source to be monitored, the sampling module configured to detect the value of a parameter of the source to be monitored; and an output module for communicating the value to a user.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: September 15, 2020
    Assignee: SCHNEIDER ELECTRIC LOGISTICS ASIA PTE LTD.
    Inventors: Liew Yew Loung, Yong Heng Han, Chong Pat Jong
  • Patent number: 10630091
    Abstract: A charging method and a related device are provided. A charge protection apparatus includes a micro control unit (MCU), a current detection circuit, a gating circuit, and an input/output (I/O) interface. The current detection circuit detects an external charging current flowing through a power cable. The current detection circuit transmits the external charging current to the MCU. The MCU transmits the external charging current to a user terminal using the I/O interface such that the user terminal calculates a current difference between the external charging current and an internal charging current detected by the user terminal, and determines, based on the current difference, whether to generate a circuit control command. The MCU receives the circuit control command from the user terminal, and controls, according to the circuit control command, the gating circuit to be in a closed state or an open state.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 21, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Hui Si, Haohui Long, Jianping Fang, Yanlin Wang, Taixiang Liu
  • Patent number: 9787080
    Abstract: A distribution manager for a power microgrid system includes a main bus, and a circuit breaker coupled to the main bus and to one of a load and an inter-microgrid connection system of the power microgrid system, the circuit breaker being structured to operate based on a set of functional trip settings. The distribution manager is structured and configured to: (i) determine an available source overcurrent that will be fed through the circuit breaker, (ii) determine a number of trip parameter settings based on at least the available source overcurrent, and (iii) set the functional trip settings of the circuit breaker based on the determined number of trip parameter settings.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: October 10, 2017
    Assignee: EATON CORPORATION
    Inventors: Charles John Luebke, Thomas J. Schoepf
  • Patent number: 9673610
    Abstract: An apparatus and method for controlling adaptive reclosing based on transient stability of a power transmission line are disclosed. The apparatus includes a power angle calculation unit, an integral square error (ISE) second-order differential calculation unit, a stability determination unit, and a disconnection signal generation unit. The power angle calculation unit acquires the instantaneous value of a power angle based on voltage and phase angle measurement signals. The ISE second-order differential calculation unit acquires the instantaneous value of the second-order differential of the ISE of the power angle. The stability determination unit determines whether a system is stable or unstable based on the transitions in the instantaneous value of the second-order differential of the ISE.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: June 6, 2017
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Chul Hwan Kim, Gi Hyeon Gwon, Yun Sik Oh, Ji Kyung Park, Gyu Jung Cho, Seung Hyun Sohn
  • Patent number: 9590414
    Abstract: A current controller for generating a control signal which controls supply current flowing from a power source to a load includes an interface circuit which sets a threshold based on an instruction from an outside of the current controller, a threshold setting circuit which stores and outputs the threshold, a sensing circuit which determines a current or a temperature of a sensing element, and outputs a signal indicating that the supply current should be interrupted as the control signal if a determined current or a determined temperature exceeds the threshold, and a sensing control circuit which generates a clock signal including pulses with a predetermined period. The sensing circuit determines the current or the temperature of the sensing element during an active period of the clock signal.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: March 7, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshihide Kanakubo, Noboru Nakashima
  • Patent number: 9472307
    Abstract: A method can be used for checking the operation of a device of electrically erasable programmable read-only memory type powered by a power supply voltage and associated with a power on reset circuit. The method includes implementation of at least one pilot operation corresponding to a phase of operation of the device that is identified as a phase that is inclined to malfunction in the event of a drop in the power supply voltage below a given value, execution of the at least one pilot operation during the operation of the memory device, and analysis of the result of the pilot operation so as to detect any malfunction not prevented by the reset circuit.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: October 18, 2016
    Assignee: STMicroelectronics (Rousset) SAS
    Inventors: François Tailliet, Marc Battista
  • Patent number: 9397520
    Abstract: A multi-output power supply comprises an input power port for receiving input power, a first output power port supplying a first voltage derived from the input power, a second output power port supplying a second voltage derived from the input power, and a shut-down circuit configured to shut down the first output power port, independently of the second output power port, if power drawn from the first output power port exceeds a first predetermined value.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: July 19, 2016
    Assignee: Sensormatic Electronics, LLC
    Inventors: George Redpath, Thomas Naughton, Robert Budd, Mark McMaster
  • Patent number: 9265134
    Abstract: A circuit arrangement for protection against electrostatic discharges has a diverting structure, which includes a diverting element and a switchable element. The diverting element can be set up to drain off an electrostatic discharge between a first and a second terminal. The switchable element can take a first and a second switching state, where a function of the diverting element can be activated depending on the switching state of the switchable element.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: February 16, 2016
    Assignee: AMS AG
    Inventor: Dieter Maier
  • Patent number: 9013847
    Abstract: According to one embodiment, there is provided a protection relay apparatus that protects lines of a three-phase alternating current power system, the protection relay apparatus including a fault detector to detect a fault of the line, an opening unit to open a circuit breaker of a fault phase in which the fault has occurred through detection of the fault, a fault phase voltage measurement unit to measure a voltage of the fault phase after the circuit breaker is opened, a fault recovery determination unit to determine whether the fault is recovered or not based on the voltage, and a closing unit to close the circuit breaker when the fault recovery determination unit determines that the fault is recovered.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: April 21, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yu Otomo, Hirofumi Ohno
  • Publication number: 20150062765
    Abstract: A resettable circuit protection system for a vehicle includes a power outlet, a resettable circuit protection device, a resettable switch, a control module, and a user interface. The resettable circuit protection device is disposed in power communication with the power outlet, is operable between open and closed positions, and is configured to automatically open in response to an electrical overload condition at the power outlet. The resettable switch is electrically disposed in series with the circuit protection device, and operates between open and closed positions. The control module is disposed in signal communication with the circuit protection device and the switch. The user interface is disposed in signal communication with the control module. When the circuit protection device is open, the control module is responsive to facilitate display of a message at the user interface indicative of the circuit protection device being open, and to facilitate opening of the switch.
    Type: Application
    Filed: August 27, 2013
    Publication date: March 5, 2015
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Joseph T. Peplinski, Jeffrey J. Hoorn, Donald R. Seyerle, Wade G. Johnson, Craig Atiyeh
  • Patent number: 8810983
    Abstract: A system for protecting a load from a fault on a line comprising: a detection circuit monitoring the line; and a switch interposed between the line and the load; wherein the detection circuit triggers the switch to disconnect the load from the line when the fault is detected. The detection circuit may trigger the switch within one second of detecting the fault. The detection circuit may monitor the line voltage of the line and the fault may be detected when the line voltage exceeds 125% or 130% of the normal voltage. The load may be automatically reconnected to the line when the line voltage drops to within 5% or 10% of a normal voltage. The fault may be any one or more of an open-neutral, an over-voltage, an under-voltage, a phase loss, and an external trigger, such as an access sensor, a smoke sensor, and/or a heat sensor.
    Type: Grant
    Filed: December 4, 2009
    Date of Patent: August 19, 2014
    Assignee: ASCO Power Technologies, L.P.
    Inventors: Glenn Wilson, Daniel Buchanan
  • Patent number: 8804973
    Abstract: In an example signal clustering apparatus, a feature of a signal is divided into segments. A first feature vector of each segment is calculated, the first feature vector having has a plurality of elements corresponding to each reference model. A value of an element attenuates when a feature of the segment shifts from a center of a distribution of the reference model corresponding to the element. A similarity between two reference models is calculated. A second feature vector of each segment is calculated, the second feature vector having a plurality of elements corresponding to each reference model. A value of an element is a weighted sum and segments of second feature vectors of which the plurality of elements are similar values are clustered to one class.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: August 12, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Makoto Hirohata, Kazunori Imoto, Hisashi Aoki
  • Patent number: 8781637
    Abstract: A power distribution system (that can detect an unsafe fault condition where an individual or object has come in contact with the power conductors) regulates the transfer of energy from a source to a load. Periodically, the source controller opens an S1 disconnect switch, a and load controller opens an S2 disconnect switch. A capacitor represents the capacitance across the load terminals. If the capacitor discharges at a rate higher or lower than predetermined values after the S1 and S2 disconnect switches are opened, then a fault condition is registered, and the S1 and S2 switches will not be commanded to return to a closed position, thus isolating the fault from both the source and the load.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: July 15, 2014
    Assignee: VoltServer Inc.
    Inventor: Stephen S. Eaves
  • Publication number: 20140160356
    Abstract: A data processing device includes a clock converter, a data converter, ad an error detector. The clock converter is configured to receive a first clock signal, convert the first clock signal into a second clock signal, and output the second clock signal. The data converter is configured to receive first data, convert the first data into second data using the second clock signal, and output the second data. The error detector is configured to check whether the first clock signal is in a first clock state or a second clock state upon the first data transitioning to a first data state, and output an enable signal to the clock converter upon determining that the first clock signal has transitioned to the first clock state from the second clock state.
    Type: Application
    Filed: November 4, 2013
    Publication date: June 12, 2014
    Applicant: SAMSUNG DISPLAY CO., LTD.
    Inventors: Tae-Pyeong Kim, Han-Kyul Lim, Cheon-Oh Lee
  • Patent number: 8743519
    Abstract: The reclosing control device configured to perform a reclosing control in case of a fault in a transmission line. Further, the reclosing control device includes a voltage detection unit configured to detect a faulted phase voltage waveform and extract a harmonic component contained in the faulted phase voltage waveform; a HR calculating unit configured to calculate ratio values between even harmonics and odd harmonics based on the extracted harmonic component; and a reclosing control unit configured to determine whether or not an arc is finally extinguished based on the calculated ratio value and perform a reclosing control depending on a result of the determination.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: June 3, 2014
    Assignee: Sungyunkwan University Foundation for Corporate Collaboration
    Inventors: Chul Hwan Kim, Chul Moon Lee, Hun Chul Seo
  • Patent number: 8674631
    Abstract: A power conversion apparatus includes: a line breaker that is connected in series to a direct-current power supply; a first capacitor that is connected in parallel to the direct-current power supply through the line breaker; a discharge circuit that includes a resistor and a first switching circuit connected in series and is connected in parallel to the first capacitor; a power converter for driving a synchronous machine; a second capacitor that is connected in parallel to a direct-current side of the power converter; a second switching circuit that is connected in series between the first capacitor and the second capacitor; and a control circuit for controlling the discharge circuit. The control circuit controls the discharge circuit on the basis of the voltage of the first capacitor and the voltage of the second capacitor.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: March 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masaki Kono, Keita Hatanaka
  • Publication number: 20130342944
    Abstract: An electronic circuit is provided that has a function of protecting an IC element (10) from excess current cause by latch-up. The electronic circuit includes an IC element (10) having a terminal (N1) connecting to power voltage (VCC) and a terminal (N2) connecting to ground voltage, and an automatic reset fuse (11) that is connected to either of the terminals.
    Type: Application
    Filed: August 10, 2011
    Publication date: December 26, 2013
    Applicant: GVBB HOLDINGS S.A.R.L.
    Inventor: Hiroki Kanamaru
  • Publication number: 20130329326
    Abstract: Systems and methods for dynamically clearing faults in a power transmission line involve automatically terminating ends of a section of the power line while preserving electrical and/or physical continuity of the power line. The terminating of the ends is reversed at about voltage zero-crossings in the power line to clear a fault.
    Type: Application
    Filed: August 15, 2013
    Publication date: December 12, 2013
    Inventors: RODERICK A. HYDE, MURIEL Y. ISHIKAWA, LOWELL L. WOOD, Jr., VICTORIA Y.H. WOOD
  • Publication number: 20130215542
    Abstract: The present invention is directed to an electrical wiring system that includes a connector device having connector contacts coupled to termination structures that couple a first AC power conductor and a second AC power conductor to corresponding contacts of the plurality of connector contacts. An electrical wiring device includes a device housing having a front portion and a rear portion. The front portion includes at least one user-accessible control element disposed thereon. The at least one user-accessible control element is coupled to an electrical switch mechanism disposed in the device housing and coupled to a plurality of device contacts. The plurality of device contacts are accessible by way of a device connection arrangement formed in the rear portion of the device housing. The plurality of device contacts are configured to mate with the plurality of connector contacts when the connector device is coupled to the device connection arrangement.
    Type: Application
    Filed: August 13, 2012
    Publication date: August 22, 2013
    Applicant: PASS & SEYMOUR, INC.
    Inventors: John Benoit, Richard Weeks, Gerald R. Savicki
  • Publication number: 20130128402
    Abstract: According to one embodiment, there is provided a protection relay apparatus that protects lines of a three-phase alternating current power system, the protection relay apparatus including a fault detector to detect a fault of the line, an opening unit to open a circuit breaker of a fault phase in which the fault has occurred through detection of the fault, a fault phase voltage measurement unit to measure a voltage of the fault phase after the circuit breaker is opened, a fault recovery determination unit to determine whether the fault is recovered or not based on the voltage, and a closing unit to close the circuit breaker when the fault recovery determination unit determines that the fault is recovered.
    Type: Application
    Filed: January 14, 2013
    Publication date: May 23, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Kabushiki Kaisha Toshiba
  • Patent number: 8432277
    Abstract: An alarm device includes: a detection device which detects an occurrence of an abnormal condition within a monitoring area; a transmission device which transmits an alarm signal when the detection device detects the abnormal condition; and an output device which, after the transmission device has transmitted the alarm signal, outputs an alarm after a lapse of a predetermined time after the transmission.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: April 30, 2013
    Assignee: Hochiki Corporation
    Inventors: Yoshitaka Egawa, Isao Asano, Hiroshi Shima
  • Patent number: 8432113
    Abstract: A brushless fan motor control circuit assembly consists of a high-frequency filter circuit, a rectifier circuit, a power factor enhancing circuit, a current-limit and voltage regulation circuit and a brushless fan motor driving circuit. By means of the high-frequency filter circuit to suppress high frequency noises, the power factor enhancing circuit to enhance the power factor and to save power consumption, the current-limit and voltage regulation circuit to limit the current and to achieve overload protection, the brushless fan motor control circuit assembly controls the operation of a motor of an electric accurately and safely, avoiding fan vibration.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: April 30, 2013
    Inventor: Hsien-Meng Lee
  • Publication number: 20120307409
    Abstract: An AC contactor with a mechanical short circuit self-locking function includes an AC contactor body. The AC contactor body includes a shell body, wherein a mechanical short circuit self-locking unit is provided therein. The mechanical short circuit self-locking unit includes a short circuit detecting and triggering device for generating a triggering action when a fault of short circuit occurs; and a self-locking acting device for generating a self-locking action after receiving the triggering action, so as to disable the AC contactor to automatically reset after the fault of short circuit is removed.
    Type: Application
    Filed: December 17, 2010
    Publication date: December 6, 2012
    Inventor: Jiasheng Wan
  • Patent number: 8314697
    Abstract: An alarm device includes a first detecting unit and a controlling unit. The first detecting unit has an isolating circuit, a first enabling circuit, a second enabling circuit and an output circuit. The isolating circuit generates an adjusting signal according to an input signal. The first enabling circuit generates a first enabling signal according to the adjusting signal. The second enabling circuit generates a second enabling signal according to the first enabling signal. The output circuit outputs a first detecting signal according to the second enabling signal. The controlling unit outputs a control signal according to the first detecting signal. The control signal controls an electronic device to operate under a standby mode when the first detecting signal refers to an abnormal status.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: November 20, 2012
    Assignee: Delta Electronics, Inc.
    Inventors: Chien-Hua Chen, Wei-Long Tai
  • Patent number: 8237309
    Abstract: An arrangement having DC power supply units connection parallel, wherein, the power supplies of the DC power supply units each generate a partial output current for supplying a load with a total output current. In accordance with the invention, an overload of power supply units when the power supply units are switched on and/or during their restart is largely avoided.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: August 7, 2012
    Assignee: Siemens AG
    Inventor: Arnold Klamm
  • Patent number: 8223467
    Abstract: An isolation device having normally off detection is provided. The isolation device having normally off detection includes a transient blocking unit (TBU) having at least one depletion mode device disposed between a pair of sense terminals, and at least one normally off transition element disposed to drive a gate of the depletion mode device in the TBU, where the normally off transition element transitions from a first resistive state to a second resistive state and one depletion mode device is connected to one sense terminal, and the normally off transition element transitions by detection of a current through the TBU. The TBU can be unidirectional or bidirectional.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: July 17, 2012
    Assignee: Bourns, Inc.
    Inventor: Andrew J. Morrish
  • Patent number: 8183718
    Abstract: A method for controlled reclosing of branch elements in an electric power system that has been subjected to a disturbance and that includes at least one branch element and at least one circuit breaker connected thereto. The angular difference between voltage vectors on both sides of the circuit breaker or at two end points of the branch element is detected and compared with a comparison value. In dependence on a magnitude of a deviation of the angular difference from the comparison value, the reclosing is either completed or blocked. The comparison value is updated automatically and regularly in such a way that an adaptive value is obtained. A system includes an element arranged to update the comparison value automatically and regularly in such a way that an adaptive value is obtained.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: May 22, 2012
    Assignee: ABB AB
    Inventors: Daniel Karlsson, Göran Runvik
  • Patent number: 8145443
    Abstract: Disclosed herein is a Fourier transform-based phasor estimation method and apparatus capable of eliminating the influence of exponentially decaying DC offsets. According to a Fourier transform-based phasor estimation method according to an embodiment of the present invention, an input signal is sampled, and samples of one-cycle data of the input signal are separated into at least two sample groups. A Discrete Fourier Transform (DFT) is performed on each of the sample groups. A DC offset included in the input signal is calculated on a basis of results of the DFT on each of the sample groups, and an error caused by the DC offset is calculated using the calculated DC offset. A phasor of a fundamental frequency component included in the input signal is estimated by eliminating the calculated error, caused by the DC offset, from the results of the DFT on the input signal.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: March 27, 2012
    Assignee: Myongji University Industry and Academia Cooperation Foundation
    Inventors: Sang Hee Kang, Dong Gyu Lee
  • Patent number: 8139333
    Abstract: A short circuit protection circuit which readily recovers a relay drive circuit to an output operation state after a short circuit is cancelled while preventing the relay drive circuit from being damaged by a short circuit. The relay drive circuit outputs a drive current to a load in accordance with a first control signal. A short circuit detection circuit detects the occurrence of a short circuit at an output side of the relay drive circuit and suspends output operation of the relay drive circuit when a short circuit occurs. Further, the short circuit detection circuit intermittently transmits a recovery signal to the relay drive circuit in a certain time interval after a predetermined time elapses from when the short circuit occurs to recover the output operation of the relay drive circuit. The time interval is gradually increased whenever the recovery signal is transmitted.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: March 20, 2012
    Assignee: Kabushiki Kaisha Tokai Rika Denki Seisakusho
    Inventors: Takao Imai, Hiroshi Mori, Jun Ito, Hisao Niwa
  • Patent number: 8125750
    Abstract: An electrical isolation system specifically adapted for use in street furniture (10) having an electrical supply (24) to working electrical components (20) is described. The system includes an impact sensor (22) located in use within the street furniture and a monitoring unit (30) and an electrical isolator (32) located in use remote from the street furniture. When the impact sensor is activated a signal is sent to the monitoring unit which sends a signal to the electrical isolator to disconnect the electrical supply to the working components of the street furniture. A method of providing electrical isolation in street furniture (10) having an electrical supply (24) to working electrical components (20) is also described.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: February 28, 2012
    Assignee: PACS Services Limited
    Inventor: Norman Probert
  • Publication number: 20120039005
    Abstract: A current controller for generating a control signal which controls supply current flowing from a power source to a load includes an interface circuit which sets a threshold based on an instruction from an outside of the current controller, a threshold setting circuit which stores and outputs the threshold, a sensing circuit which determines a current or a temperature of a sensing element, and outputs a signal indicating that the supply current should be interrupted as the control signal if a determined current or a determined temperature exceeds the threshold, and a sensing control circuit which generates a clock signal including pulses with a predetermined period. The sensing circuit determines the current or the temperature of the sensing element during an active period of the clock signal.
    Type: Application
    Filed: October 25, 2011
    Publication date: February 16, 2012
    Applicant: Panasonic Corporation
    Inventors: Yoshihida KANAKUBO, Noboru Nakashima
  • Patent number: 8116050
    Abstract: To provide a semiconductor integrated circuit including: a detection circuit that detects an occurrence of latch up and can be configured while adopting a layout configuration that suppresses the occurrence of latch up; and a recovery unit that enables a recovery from the latch up without cutting off a positive potential. The semiconductor integrated circuit includes: a n-channel MOS transistor 7 that is formed on a P-type region 3 on a semiconductor substrate; and a latch up detection circuit that detects an occurrence of latch up in the n-channel MOS transistor 7. The latch up detection circuit includes: a n-MOS transistor structure 12 in which a source 10 and a back gate 8 are connected in common with a source 5 and the back gate 8 of the n-channel MOS transistor 7; and an electric current detection unit 15 that detects an electric current flowing to a drain 9 of the n-MOS transistor structure 12.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: February 14, 2012
    Assignee: Panasonic Corporation
    Inventors: Toshinobu Nagasawa, Tetsushi Toyooka, Masaharu Sato
  • Publication number: 20110299205
    Abstract: A voltage protecting circuit includes a switch unit, an upper limited voltage detecting unit, a lower limited voltage detecting unit, and a logic control unit. When a voltage output from a voltage input interface is less than the lower limited voltage or greater than the upper limited voltage, the logic control unit outputs a control signal to turn the switch unit off. The output voltage outputted from the voltage input interface is not provided to a working circuit. When the output voltage outputted from the voltage input interface is greater than the lower limited voltage and less than the upper limited voltage, the logic control unit outputs a control signal to turn the switch unit on. The output voltage output from the voltage input interface is provided to the working circuit.
    Type: Application
    Filed: June 18, 2010
    Publication date: December 8, 2011
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Heng-Chen Kuo
  • Patent number: 7961445
    Abstract: A new method for three-phase reclosing of transmission lines is disclosed. According this method, after the type of fault is identified and the faulted line is opened for all three phases from both ends, fault extinction is recognized by comparison of amplitudes and angles of voltages induced at opened phases with predetermined settings. The transmission line is reclosed after the fault is found to be extinguished.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: June 14, 2011
    Inventor: Mark I. Khoroshev
  • Publication number: 20110102956
    Abstract: A load driving device according to an exemplary aspect of the present invention includes: an output transistor coupled between a first power supply line and an output terminal, the output terminal being configured to be coupled with a load; a protection transistor that is provided between a gate of the output transistor and a second power supply line, and brings the output transistor into a conduction state when a polarity of a power supply coupled between the first power supply line and the second power supply line is reversed; and a back gate control circuit that controls the second power supply line and a back gate of the protection transistor to be brought into a conduction state in a standby mode when the polarity of the power supply is normal.
    Type: Application
    Filed: October 15, 2010
    Publication date: May 5, 2011
    Applicant: Renesas Electronics Corporation
    Inventor: Akihiro NAKAHARA
  • Patent number: 7911753
    Abstract: Apparatus and method are described, illustratively in an LVLS master/slave system, for detecting a circuit failure, shutting down the system as if a normal power down function has occurred, but restarting the system. Signals, including power and ground lines are monitors, mal-functions detected and the apparatus put into a power down sequence. Illustratively in the LVLS system, driving a signal line to either the power or ground rails is used as a signal to the apparatus to enter the power down sequence. The present invention, after a programmable time, then drives the signal line to the opposite rail thereby signaling the system to restart—a wake up mode. After a programmable time, the signal line is released and the system resumes normal operation.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: March 22, 2011
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Christian Klein, Seth Prentice
  • Patent number: 7889471
    Abstract: A power supply providing current interruption based on the energy from the supply over a sliding window of time is disclosed. The output current from the supply is periodically reestablished.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: February 15, 2011
    Assignee: Echelon Corporation
    Inventors: Gilles vanRuymbeke, Andrew Robinson
  • Patent number: 7876539
    Abstract: Various electrical apparatuses which include a current dampening device are disclosed. In one embodiment, an electrical apparatus is provided which includes a motor and a switch having an “on” position and an “off” position to control the operation of the motor. A current dampening device is connected in parallel with the motor downstream from the switch to dampen transient current. In another embodiment a ground fault circuit interrupter (GFCI) is electrically connected to the motor upstream from the switch.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: January 25, 2011
    Assignee: Pentair Pump Group, Inc.
    Inventor: Bill Tharp
  • Publication number: 20100328828
    Abstract: A method of protecting a circuit includes measuring a value associated with a circuit having a current flowing through a switch to a load and comparing the measured value to a threshold. If the measured value meets or exceeds the threshold, the switch is turned OFF and a counter is incremented. If the counter is less than the counter limit, and a predefined time period has elapsed, the switch is turned back ON.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 30, 2010
    Inventor: Jian Xu
  • Publication number: 20100296215
    Abstract: A circuit testing closer is capable of closing a power distribution circuit and interrupting the resulting current at the next current zero. Upon detecting a fault, the circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted line to determine whether the fault has cleared. The circuit testing closer may employ one or more dynamic thresholds to determine the existence of a fault.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 25, 2010
    Applicant: S & C ELECTRIC COMPANY
    Inventors: Alejandro Montenegro, Raymond P. O'Leary
  • Publication number: 20100254053
    Abstract: A system for protecting a load from a fault on a line comprising: a detection circuit monitoring the line; and a switch interposed between the line and the load; wherein the detection circuit triggers the switch to disconnect the load from the line when the fault is detected. The detection circuit may trigger the switch within one second of detecting the fault. The detection circuit may monitor the line voltage of the line and the fault may be detected when the line voltage exceeds 125% or 130% of the normal voltage. The load may be automatically reconnected to the line when the line voltage drops to within 5% or 10% of a normal voltage. The fault may be any one or more of an open-neutral, an over-voltage, an under-voltage, a phase loss, and an external trigger, such as an access sensor, a smoke sensor, and/or a heat sensor.
    Type: Application
    Filed: December 4, 2009
    Publication date: October 7, 2010
    Applicant: EMERSON ELECTRIC CO.
    Inventors: Glenn Wilson, Daniel Buchanan
  • Patent number: 7656628
    Abstract: Apparatus is provided to limit the current drawn from a power supply output connected to furnish power to a docking station or electronic device, when a fault connects the output to ground or other docking connection. The power supply is disconnected when such fault is present during power-up. In one embodiment, the apparatus controllably limits current delivered to a docking station and a mobile device connected thereto. The apparatus includes a switch device located along a current path extending between the power supply and docking station, to regulate current flow. A current limiting entity operates the switch device to prevent current flow, when the fault affects the circuit, and current through the path exceeds a pre-specified threshold level. The pre-specified current threshold level can be less than the current level provided to the docking station and mobile device without said fault.
    Type: Grant
    Filed: August 4, 2006
    Date of Patent: February 2, 2010
    Assignee: International Business Machines Corporation
    Inventors: Robert Thomas Cato, Timothy Wayne Crockett
  • Publication number: 20100008004
    Abstract: A method for providing an analog or digital circuit that senses both low and high input voltage and operates to disconnect both line and neutral electrical power connections to a protected device when abnormally low or high voltages are received from a single- or multi-phase power source, and reconnects the protected device when input power has stabilized. The sensing circuit and power supply is functional with voltages up to at least 240 Vac. The nominal 120 Vac circuit is designed to withstand a 6 kilovolt surge without damage. The method does not disconnect the ground line during an out-of-tolerance voltage condition.
    Type: Application
    Filed: July 29, 2009
    Publication date: January 14, 2010
    Applicant: Monster, LLC
    Inventors: Einstein C. Galang, Demian Martin, Sobswad Pholpoke
  • Publication number: 20100002347
    Abstract: The invention provides an animal asphyxiation device comprising a housing (10) for containing an animal and a gas distribution means (28) arranged inside the housing to allow even distribution of gas throughout the housing.
    Type: Application
    Filed: February 12, 2007
    Publication date: January 7, 2010
    Applicant: PACS SERVICES LIMITED
    Inventor: Norman Probert
  • Publication number: 20090257159
    Abstract: A short circuit protection circuit which readily recovers a relay drive circuit to an output operation state after a short circuit is cancelled while preventing the relay drive circuit from being damaged by a short circuit. The relay drive circuit outputs a drive current to a load in accordance with a first control signal. A short circuit detection circuit detects the occurrence of a short circuit at an output side of the relay drive circuit and suspends output operation of the relay drive circuit when a short circuit occurs. Further, the short circuit detection circuit intermittently transmits a recovery signal to the relay drive circuit in a certain time interval after a predetermined time elapses from when the short circuit occurs to recover the output operation of the relay drive circuit. The time interval is gradually increased whenever the recovery signal is transmitted.
    Type: Application
    Filed: April 8, 2009
    Publication date: October 15, 2009
    Applicant: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO
    Inventors: Takao IMAI, Hiroshi MORI, Jun ITO, Hisao NIWA
  • Publication number: 20090213510
    Abstract: Apparatus and method are described, illustratively in an LVLS master/slave system, for detecting a circuit failure, shutting down the system as if a normal power down function has occurred, but restarting the system. Signals, including power and ground lines are monitors, mal-functions detected and the apparatus put into a power down sequence. Illustratively in the LVLS system, driving a signal line to either the power or ground rails is used as a signal to the apparatus to enter the power down sequence. The present invention, after a programmable time, then drives the signal line to the opposite rail thereby signaling the system to restart—a wake up mode. After a programmable time, the signal line is released and the system resumes normal operation.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 27, 2009
    Inventors: Christian Klein, Seth Prentice
  • Publication number: 20090185319
    Abstract: A method of breaking an overcurrent is provided to connect an overcurrent breaking controller in series between an AC power and a load. Thus, when detecting the connected load of which the current generated with the consumed power is higher than a rated current of the overcurrent breaking controller, the overcurrent breaking controller instantly stops the load working, when detecting the current passing through the load that is lower than the rated current, the controller allowing the load to re-work. Thus, the load of which the rated current exceeds is prevented from being replaced, and automatic power shut and recovery are implemented for protection, power saving, easy installation, and energy waste prevention.
    Type: Application
    Filed: January 23, 2008
    Publication date: July 23, 2009
    Inventor: Hsien-Meng LEE
  • Patent number: 7565459
    Abstract: The invention describes combination I/O modules for automation. Various combinations of inputs and output with different electrical interfaces are offered providing greater flexibility in controller hardware selection.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: July 21, 2009
    Inventor: Shalabh Kumar
  • Publication number: 20080310056
    Abstract: The present invention provides a remote operable over-current protection apparatus. The apparatus includes control circuitry integrally arranged on a current path and a micro electromechanical system (MEMS) switch disposed on the current path, the MEMS switch responsive to the control circuitry to facilitate the interruption of an electrical current passing through the current path. The apparatus further includes a communication connection in signal connection with the control circuitry such that the control circuitry is responsive to a control signal on the communication connection to control a state of the MEMS switch.
    Type: Application
    Filed: June 15, 2007
    Publication date: December 18, 2008
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Brent Charles Kumfer, William James Premerlani, Robert Joseph Caggiano, Kanakasabapathi Subramanian, Christopher Fred Keimel, Charles Stephan Pitzen, David James Lesslie, Parag Thakre
  • Publication number: 20080297962
    Abstract: Embodiments of bus interface circuitry and methods for short circuit detection are generally described herein. Other embodiments may be described and claimed. In some embodiments, the bus interface circuitry comprises logic circuitry to compare a driver stage output signal at a bond pad to internal reference voltages to generate control signals indicative of whether a short-circuit condition exists on a bus. The driver stage of the bus interface may be temporarily disabled when a short-circuit condition is indicated by the control signals.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 4, 2008
    Applicant: INFINEON TECHNOLOGIES AGAM CAMPEON
    Inventors: Andreas Hebenstreit, Werner Hollinger